Finding the Fourth Proportional to 2,452.91, 3,679.91 and 809.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,452.91 : 3,679.91 = 809.39 : x
2. Step 2: Convert to fraction form
   2,452.91/3,679.91 = 809.39/x
3. Step 3: Cross multiply
   2,452.91x = 3,679.91 × 809.39
4. Step 4: Simplify right side
   2,452.91x = 2,978,492.57
5. Step 5: Solve for x
   x = 2,978,492.57/2,452.91
6. Step 6: Final answer
   x = 1,214.27